System for operating relays



J. P. FERRITER ET AL SYSTEM FOR OPERATING RELAYS Patented 30ml 2.FERBITER, 015 BOSTON, MASSACHUSETTS, AND EARLY E. STRADLEY, OF

- WEST ORANGE, NEW JERSEY.

SYSTEM FOR OPERATING RELAYS.

Application filed li'ovember 13, 1925. Serial No. 68,867.

This invention relates to a system whereby a rela may be operated bymeans of signals recor, ed on a phonograph record.

One of the objects of this method is to teach telegraphnsend'mg andreceiving by meansof phono raph records. Another object'is to record ighspeed telegraph signals on a phonograph record and then to reproducethesignals at slow speed for the purpose of reading them by sound or tooperate a telegraph printer or other suitable device.

In order to operate sounders or to interrupt a tone for instruction intelegraph operating by means of a phonograph record, it was necessary tocause the signals reproduced from the record to operate a relay.

This is accomplished by recording a series.

of indentations on the record for each dot or dash signal. For example:a dot may be represented by approximatelytwenty indentations and a dashby sixty.' These indentations may be recorded on the. record 'by using abuzzer or an alternating current generator of a suitable frequency, tothrow the phonograph recorder diaphragm into vibra tion when a controlkey is'closed. In reproducin these signals, when the record is plalyethe "vibrations of the reproducer sty us of the phonograph, as it movesover these indentations, are caused to operate the relay in one of thefollowing ways.

With the foregoing and other objects in view the invention consists inthe combination and arrangement of parts hereinafter described, certainembodiments thereof being shown in the accompanying drawings,

in whichi Fig. 1 is a diagrammatical showing of the relay attached to aphono aph record whose stylus is directly attache to a telephone;

Fi 2 is asimilar showing of the relay attac ed to a phonograph recordhaving its own diaphragm;-

Fig. 3 is a showing of that illustrated in Fig. 1 in connection with theremainder of the system. r

Fig. 4 is a Fig. 2 in connection with the remainder of the system.

. Referring more particularly to the drawings, the stylus of thereproducer is either connected directly to a tale hone transmitterdiaphragm, as shown in ig. 1, where A is the carbon cup of thetransmitter, B is the showing of that illustrated 1n" diaphragm, C isthe stylus and D is the phonograph'record, or to a diaphragm of its own,as shown in Figure 2, where A is latter case, the telephone transmitteris actuated through an air column. The telephone transmitter is nextcaused to modulate a current sent through it in the usual manner. Inthis way, there is a modulated current flowing through the transmitterevery time the reproducing stylus of the phonograph.

passes over a signal on the record. The alternating current component,which is only present during a signal, is-next rectified and caused tooperate a relay. One method of doing thisis shown in Figure 3, where Ais the ,carbon cup of the transmitter, B is the diaphragm, C is thestylus, D is the phonograph record, E is a battery connected in serieswith A and the primary winding of induction coil F. The vacuum tubedetector circuit is represented by G and the relay to be operated isrepresented by H.

involves the use of a device mounted in place of the regular reproducerof the phonograph This device is shown in Figure 4.

In Figure 4, A is a small bar pivoted at one end and carrying a contactnear the other end, B is a flat spring, rigidly fastened atone end,carrying a contact near the other end, facing the contact on A. Spring Bis attached by a stiff wire C to the inertia bar D, which carries thereproducing stylus'E. F is the phonograph record.

The action of this device is as follows: When the reproducing styluspasses over the series of indentations on the record forming a signal,the spring B is causedto vibrate.

Due to the inertia of the bar A, the contact or other device. Thecircuit is shown in Figure 4, where G: and G are batteries, H is a relaycoil and J is the sounder.

Having thus described our invention, We claim:

1 A system for operating a relay comprising a telephone transmittercircuit, a vibratory diaphragm, arelay, a phonograph record attached tosaid diaphragm, a reproducer, means for placing a series of indentationson said record to represent a signal, means for reproducingv said signalby passing the stylus of said producer over said indentations so as tovibrate said diaphragm,

weasel said diaphragm being adapted to modulate current passing throughsaid transmitter circuit so as to operate said relay after rectificationof said current, said diaphragm also being adapted topartiallyopen andclose a circuit containing a battery and the coils of a relay at asufliciently high ire quency to practically stop the flow of cur rentthrough the relay coils and allow the armature to be released.

In testimony whereof we aflix our signatures.

- JOHN P. FERRITER.

'EAiRLY E. STRADLEY.

